Answer: 1 How many grams of KCl will dissolve in 1 liter of H2O at 50 °C? 5. 58.0 g of K2Cr2O7 is added to 100 g H2O at. 0 °C. With constant stirring, to what temp-. 2 34 °C? 4. How many grams of KCl will dissolve in 1 liter of H2O at 50 °C? 5. 58.0 g of ... A saturated solution of KClO3 was made with 300 g of H2O at. 34 °C.
Explanation:
You can find the mass of an atom by adding the number of protons and neutrons. In this case the atom has 2 protons and 3 neutrons so the mass is 5.
Answer:
6 and 14 respectively
Explanation:
proton number = atomic number
mass number = proton number + neutron number
since
- p.n = a.n = 6
- m.n = p.n + n.n
- m.n = 6 + 8 = 14
- m.n = 14
Answer:
v_avg = 2.9 cm/s
Explanation:
The average velocity of the object is the sum of the distance of all its trajectories divided the time:
![v_{avg}=\frac{x_{all}}{t}](https://tex.z-dn.net/?f=v_%7Bavg%7D%3D%5Cfrac%7Bx_%7Ball%7D%7D%7Bt%7D)
x_all is the total distance traveled by the object. In this case you have that the object traveled in the first trajectory 165cm-15cm = 150cm, and in the second one, 165cm - 25cm = 140cm
Then, x_all = 150cm + 140cm = 290cm
The average velocity is, for t = 100s
![v_{avg}=\frac{290cm}{100s}=2.9\frac{cm}{s}](https://tex.z-dn.net/?f=v_%7Bavg%7D%3D%5Cfrac%7B290cm%7D%7B100s%7D%3D2.9%5Cfrac%7Bcm%7D%7Bs%7D)
hence, the average velocity of the object in the total trajectory traveled is 2.9 cm/s